A six-mile segment of Interstate 15 in San Bernardino County, Calif., will be augmented with tolled express lanes to provide much-needed capacity for the corridor’s growing volume of freight traffic. Nearly 200 million sq ft of distribution facilities are located within five miles of the segment, which already averages 223,000 vehicles per day and includes key interchanges with Interstate 10 and State Route 60. Along with the new lanes, lead designer Michael Baker International will engineer the widening of 16 bridge structures, including three over-railroad widenings, and approximately 12,000 linear ft of retaining walls. Construction of the $200-million project, scheduled to begin in 2024, will tie in to recently completed express lanes in Riverside County and will be synchronized with the planned Brightline West passenger rail project.